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Chemical Engineering - Mass Transfer

Exercise : Mass Transfer - Section 4
16.
Large scale drying of wheat is done in a __________ dryer.
fluidised bed
spouted bed
tray
vacuum rotary
Answer: Option
Explanation:
No answer description is available. Let's discuss.
17.
Azeotropic distillation is employed to separate
constant boiling mixture.
high boiling mixture.
mixture with very high relative volatility.
heat sensitive materials.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
18.
The drying time between fixed moisture content within diffusion controlled 'falling rate period' is proportional to (assuming that drying occurs from all surfaces of the solid) (where, T = thickness of the solid )
T
T
T2
T3
Answer: Option
Explanation:
No answer description is available. Let's discuss.
19.
At the boiling point of the liquid at the prevailing pressure, the saturated absolute humidity becomes
1
0
∞
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
20.
Use of natural draft cooling tower is practised, when the air has low
humidity
temperature
both 'a' & 'b'
neither 'a' nor 'b'
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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